PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1633-37-30PC135Trap,steam

Spirax Sarco Inc Dba Spirax Sarco · NSN 4730-00-256-7301 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-00-256-7301 — this item is cataloged by the U.S. Government under National Stock Number 4730-00-256-7301. Primary manufacturer part number: 1633-37-30PC135.
Features
  • Trap,steam — FSC 4730
  • Furnished Items: STRAINER
  • Maximum Steam Working Pressure: ERR-060
  • Design Type: THERMOSTATIC
  • Body Design: STRAIGHT PATTERN
  • Rated Capacity at Maximum Working Pressure: 1175.0 POUNDS OF WATER PER HOUR LBS
  • Nondefinitive Spec/std Data: 2 CLASS
  • Material: STEEL CORROSION RESISTING WORKING PARTS
Applications
  • Applications requiring Steel Corrosion Resisting Working Parts construction
General Description

The Trap,steam, cataloged under National Stock Number 4730-00-256-7301, is classified within Federal Supply Class 4730 (No Item Name Available) of the Pipe, Tubing, Hose, and Fittings group. The primary manufacturer of record is Spirax Sarco Inc Dba Spirax Sarco. Government technical data includes 10 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4730-00-256-7301
Primary Part Number1633-37-30PC135
Item NameTrap,steam
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerSpirax Sarco Inc Dba Spirax Sarco
StatusACTIVE
Furnished ItemsSTRAINER
Maximum Steam Working PressureERR-060
Design TypeTHERMOSTATIC
Body DesignSTRAIGHT PATTERN
Rated Capacity at Maximum Working Pressure1175.0 POUNDS OF WATER PER HOUR LBS
Nondefinitive Spec/std Data2 CLASS
MaterialSTEEL CORROSION RESISTING WORKING PARTS
Departure From Cited DocumentAS MODIFIED BY CAPACITY AT MAX WORKING PRESSURE,RADIATING SURFACE AREA ON WHICH CAPACITY IS BASED,INLET/OUTLET CONNECTION TYPE
MaterialCOPPER ALLOY CAP
MaterialCOPPER ALLOY BODY
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
4730-00-032-1517 INTERCHANGEABLE
Trap,steam
4730-00-232-8013 INTERCHANGEABLE
Trap,steam
4730-00-232-8024 INTERCHANGEABLE
Trap,steam
4730-00-289-4616 INTERCHANGEABLE
Trap,steam
4730-00-289-4617 INTERCHANGEABLE
Trap,steam
4730-00-289-4619 INTERCHANGEABLE
Trap,steam
4730-00-935-1593J447-1IN INTERCHANGEABLE
Trap,steam
Spirax Sarco Inc Dba Spirax Sarco
4730-01-142-1786N-100 1/2 IN STWY INTERCHANGEABLE
Trap,steam
Spirax Sarco Inc Dba Spirax Sarco
2510-01-370-5004C33043 INTERCHANGEABLE
Window,vehicular
Shepherds Auto Supply Inc
Cross-Reference Index
Part NumberManufacturer
MIL-T-2118 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
1633-37-30PC135 PRIMARY Spirax Sarco Inc Dba Spirax Sarco (USA)
N157 1-2 PRIMARY Spirax Sarco Inc Dba Spirax Sarco (USA)
C33043 PRIMARY Spirax Sarco Inc Dba Spirax Sarco (USA)
Related Parts
4730-00-032-1517INTERCHANGEABLE
TRAP,STEAM
4730-00-232-8013INTERCHANGEABLE
TRAP,STEAM
4730-00-232-8024INTERCHANGEABLE
TRAP,STEAM
4730-00-289-4616INTERCHANGEABLE
TRAP,STEAM
4730-00-289-4617INTERCHANGEABLE
TRAP,STEAM
4730-00-289-4619INTERCHANGEABLE
TRAP,STEAM
4730-00-935-1593INTERCHANGEABLE
TRAP,STEAM
J447-1IN
4730-01-142-1786INTERCHANGEABLE
TRAP,STEAM
N-100 1/2 IN STWY
2510-01-370-5004INTERCHANGEABLE
WINDOW,VEHICULAR
C33043

Frequently Asked Questions

What is NSN 4730-00-256-7301?

NSN 4730-00-256-7301 is a Trap,steam, manufactured by Spirax Sarco Inc Dba Spirax Sarco, classified under FSC 4730 (No Item Name Available). Status: active.

What are the part numbers for NSN 4730-00-256-7301?

NSN 4730-00-256-7301 has 4 cross-referenced part numbers: MIL-T-2118 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 1633-37-30PC135 (Spirax Sarco Inc Dba Spirax Sarco), N157 1-2 (Spirax Sarco Inc Dba Spirax Sarco), C33043 (Spirax Sarco Inc Dba Spirax Sarco).

What NSN replaces 4730-00-256-7301?

There are 9 known substitutes for 4730-00-256-7301: 4730-00-032-1517, 4730-00-232-8013, 4730-00-232-8024 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 1633-37-30PC135?

Key specifications for 1633-37-30PC135: Furnished Items: STRAINER; Maximum Steam Working Pressure: ERR-060; Design Type: THERMOSTATIC; Body Design: STRAIGHT PATTERN. 10 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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